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  1. #1
    Join Date
    Feb 2009
    Location
    Alva, Florida.
    Posts
    24

    Default Intake valve size?

    I built my first drum with two 1" valves. One poster said to go to 3/4". I am of the mind of give it lots of air. I think that more air can raise the temp to a zone good for the food. And be able to close the air down to a nice 240 for easy cooking.. A lot of pictures here have had four valves. Four valves at 3/4 will deliver 3" of air. Would it be better to go to 1 1/2" valves times two?
    Being an old stick burner builder. I have to re think a few things.
    The attached picture, is a cooker under construction. Drums are far more fun.
    Attached Images

  2. #2
    Join Date
    Jan 2008
    Posts
    1,519

    Default

    Offset cage match?

    IMO, only 3 intakes are needed and yes, 3/4" seems to give optimum performance.
    1 with a ball valve and the other 2 with caps, plugs or magnets!

    I can run from 180 to 350 with that set-up.
    Rubbed, Smoked and Sauced BBQ Team sponsored by Barsleaks/Rislone
    Authorized Backwoods dealer.
    B.O.D. GLBBQA
    Pitmaster - Lockharts BBQ of Royal Oak
    Owner-Great Lakes BBQ Supply Co.

    I don't know what the actual temp is, but it cooks the way I want it to, so I don't guess it really matters.

  3. #3
    Join Date
    Jan 2008
    Location
    Tulsa
    Posts
    4,976

    Default

    I like the valves. I don;t like having to squat down and unscrew caps. Besides that, if you use valves all the way around, you can fine tune each one.

    The coldest weather I've ever cooked on my drum in was about 20 and windy, and 1-3/4" valve with one 1-3/4 " hole was plenty of intake. Not only that, but the valve wasn't even open halfway.

    Personally, with the climate what it is down here, I can;t imagine ever needing two 3/4"ers all the way open.

    If you're an old stickburner builder, remember, you are working with an oxygen starved fire in the drums. You don;t need or want a fraction of the draft that a stickburner would need.

  4. #4
    Join Date
    Jan 2009
    Location
    Far Northern California
    Posts
    114

    Default

    Quote Originally Posted by Boss Cooker View Post
    Four valves at 3/4 will deliver 3" of air. Would it be better to go to 1 1/2" valves times two?
    Remember you're working with round holes not square holes.

    Area of a circle = 3.14 x radius x radius

    Four 3/4" holes will give you 1.77 square inches of opening.
    Two 1 and 1/2" holes will give you 3.53 square inches of opening.
    Three 3/4" holes will give you 1.32 square inches of opening

    Quote Originally Posted by Bbq Bubba View Post
    IMO, only 3 intakes are needed and yes, 3/4" seems to give optimum performance.
    1 with a ball valve and the other 2 with caps, plugs or magnets!

    I can run from 180 to 350 with that set-up.
    What he said. ^^

    Dave

  5. #5
    Join Date
    Jan 2008
    Location
    Tulsa
    Posts
    4,976

    Default

    Quote Originally Posted by DDave View Post
    Remember you're working with round holes not square holes.

    Area of a circle = 3.14 x radius x radius

    Four 3/4" holes will give you 1.77 square inches of opening.
    Two 1 and 1/2" holes will give you 3.53 square inches of opening.
    Three 3/4" holes will give you 1.32 square inches of opening



    What he said. ^^

    Dave
    What would it hurt to use 3 ball valves?

  6. #6
    Join Date
    Jan 2009
    Location
    Far Northern California
    Posts
    114

    Default

    Quote Originally Posted by SmokyOkie View Post
    What would it hurt to use 3 ball valves?
    Wouldn't hurt a thing. A little more expensive is all but wouldn't hurt a thing.

    Dave

  7. #7
    Join Date
    Jan 2008
    Location
    Tulsa
    Posts
    4,976

    Default

    I really like the looks of the 4 ball valves on 90s with conduit straps. It looks like some sort of mad scientist's invention or something.

  8. #8
    Join Date
    Jan 2008
    Posts
    1,519

    Default

    Quote Originally Posted by SmokyOkie View Post
    What would it hurt to use 3 ball valves?
    You said you didn't like bending over, now you want to reach down 3 times???

    Quote Originally Posted by SmokyOkie View Post
    I really like the looks of the 4 ball valves on 90s with conduit straps. It looks like some sort of mad scientist's invention or something.
    Looks great!

    Works for chit!
    Rubbed, Smoked and Sauced BBQ Team sponsored by Barsleaks/Rislone
    Authorized Backwoods dealer.
    B.O.D. GLBBQA
    Pitmaster - Lockharts BBQ of Royal Oak
    Owner-Great Lakes BBQ Supply Co.

    I don't know what the actual temp is, but it cooks the way I want it to, so I don't guess it really matters.

  9. #9
    Join Date
    Jan 2008
    Location
    Tulsa
    Posts
    4,976

    Default

    Quote Originally Posted by Bbq Bubba View Post
    You said you didn't like bending over, now you want to reach down 3 times???

    Use my foot?



    Looks great!

    Works for chit!
    Not trying to be a smart *** Steve, but have you done one that way? If so, what was your experience?

  10. #10
    Join Date
    Jan 2008
    Location
    South of Peculiar, MO
    Posts
    6,736

    Default

    I just use one 3/4" ball valve. It gives ALL the air you need and allows close control. The exhaust is important, have to have enough, I use six 1" holes evenly spaced around the lid perimeter.
    If you supply a lot of air with multiple valves, plugs, whatever, to the charcoal in a drum you WILL have a FIRE. As in FLAMES.
    And a good chance of nothing to eat. And no paint on a good portion of your drum. And maybe the local Fire Dept. paying a visit.
    But what do I know?
    Build what YOU like. You'll see.
    "If you can't smell smoke it ain't a barbeque joint" peculiarmike

    TQJ Plankowner

    "Life's tough.....It's even tougher if you're stupid."
    - John Wayne

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